to change the frame rate, edit the galleries/slideshow_dissolve/js/gallery.js file, the following sets the frame rate:
delay: 4000 //ms
you can change the border of the gallery by editing the
galleries/slideshow_dissolve/css/themes/portfolio.css file, and adding a border to the .pg-sd class:
.pg-sd {
font-family: Arial,Helvetica,sans-serif;
background-color: #303030;
border: solid 1px #000;
}